JPH03123711A - Miticide composition - Google Patents

Abstract

PURPOSE:To obtain a miticide composition effectively controllable drug-resistant mites living within agricultural and horticultural crops without chemical injury to crops by jointly using fenpropathrin or fluvalinate and ethion with synergistically enhancing mite-killing effect of individual component. CONSTITUTION:A miticide composition quickly affecting and continuously exhibiting synergistic control effect on said mites such as two-spotted spider mites is obtained by containing (A) alpha-cyano-3phenoxybenzyl 2,2,3,3-tetramethyl cyclopropane carboxylate (fenpropathrin) or alpha-cyano-3-phenoxybenzyl N-(2- chloro-alpha,alpha,alpha-trifluoro-p-tolyl) valinate (fluvalinate), especially the former and (B) O,O,O,O-tetraethyl S,S-methylene bisphosphorodithioate (ethion) as active ingredients, in a weight ratio of A:B=1:(1-100) and A+B=1-80wt.% of whole drug.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a novel acaricide composition that can effectively control mites such as spider mites, rust mites, and dust mites.

<Prior art> Some organophosphorus insecticides have acaricidal activity, but due to the spread of organophosphate-resistant spider mites, it is currently difficult to find any that are sufficiently effective as acaricides. There are few. Among synthetic pyrethroids, even the group with the highest acaricidal activity does not have sufficient control effects against spider mites.

In order to compensate for the above-mentioned drawbacks, an acaricide composition containing an organic phosphorus insecticide and a synthetic pyrethroid has already been developed.
3-145206), a mixture of fenpropathrin and dimethoate (Japanese Unexamined Patent Publication No. 56-29509), and a mixture of nithion and dibermethrin (Japanese Unexamined Patent Publication No. 128309-1982). However, it cannot be said that it is necessarily sufficient in terms of effectiveness.

In addition, miticide-specific agents such as dicofol, fenbutastin oxide, and hexythiazox are also known, but in recent years, the effectiveness of these miticide-specific agents has decreased, and the development of new miticides has been desired.

<Problems to be Solved by the Invention> As a result of many acaricides being used for many years, mites that exhibit strong resistance to these acaricides have appeared in various places. Among them, drug-resistant spider mites, such as the two-spotted spider mite, false two-spotted spider mite, Kanzawa spider mite, citrus spider mite, apple spider mite, and teal dust mite, which parasitize fruit trees, vegetables, tea, flowering trees, etc., have developed remarkable drug resistance. Therefore, many acaricides have lost their practical use against these mites.

Therefore, there is a strong desire to develop new acaricides that are highly effective at low doses even against mites that have developed resistance due to the use of conventional acaricides, and that have less toxicity and less negative impact on the environment. ing.

An object of the present invention is to provide a new acaricide that meets these needs.

Means for Solving the Problems> In order to cope with the current situation, the present inventors have made extensive studies and have found that the composition shown below exhibits remarkable effects, and have completed the present invention. That is, the present invention provides (a) α-cyano-3-phenoxybenzyl 2,2,3,3-tetramethylcyclopropanecarboxylate (hereinafter referred to as "fenpropathrin") or α-cyano-3-phenoxybenzyl as an active ingredient. Phenoxybenzyl N-(2-chloro-α,α,α-trifluoro-p-)lyl)valinate (hereinafter referred to as “fluparinate”) and (b) O,0,0,0-tetraethyl S.

S-methylene bisphosphorodithioate (hereinafter referred to as
An acaricide composition (hereinafter referred to as "Nithion") characterized by containing the following:
composition of the present invention).

By using fuenprobatrin or fluparinate in combination with Nithion, the composition of the present invention can be used alone against mites such as two-spotted spider mites, false two-spotted spider mites, Kanzawa spider mites, citrus spider mites, apple spider mites, and teal dust mites on fruit trees, vegetables, tea, flowering trees, etc. It now exhibits an excellent acaricidal effect that is not seen in other plants. That is, 1. A synergistic control effect is exhibited against mites such as two-spotted spider mite, citrus spider mite, and Kanzawa spider mite that parasitize agricultural and horticultural crops, compared to the use of each active ingredient alone. Moreover, the effect appears quickly, and the effect lasts for a long time.
A high synergistic acaricidal effect is expressed. As a result, even if gold is ineffective when used alone, when used in combination, these mites can be completely controlled quickly and over a long period of time.

2. It exhibits a remarkable acaricidal effect even against mites that have developed resistance to organic synthetic acaricides.

3. It does not cause harmful chemical damage to agricultural and horticultural crops.

4. The composition of the present invention is a mixture of fenpropathrin and acephate (Japanese Unexamined Patent Publication No. 145206/1983), which has already been applied as an acaricide composition, and a mixture of fenpropathrin and dimethoate ( Japanese Unexamined Patent Publication 1983
-29509) and a mixture of nithion and dibermethrin (Japanese Unexamined Patent Publication No. 128309/1982), it has clearly superior acaricidal activity.

The composition of the present invention is particularly effective against adults and nymphs of mites, and has excellent long-lasting effects.

Furthermore, the excellent insecticidal activity of each component against other pests is not impaired in any way by mixed use.

The method for formulating and using the composition of the present invention will be specifically explained below.

In order to produce the composition of the present invention, the active ingredient of the present invention is blended with suitable carriers and auxiliary agents such as surfactants, binders, stabilizers, etc., and the compositions are prepared as wettable powders, emulsions, flowables, etc. by conventional methods. It may be formulated into a powder, DL (driftless type) powder, or the like.

In this case, the mixing ratio of fenbropatrine or fluparinate and nithion is 1:1 to 1:100, preferably 1:1 to 1:50, and the total active ingredient content (weight ratio) in the preparation is 1 to 1:1. It is 80%.

As the carrier that can be used in the composition of the present invention, any solid or liquid carrier commonly used for agricultural and horticultural chemicals can be used, and the carrier is not limited to a specific carrier.

For example, solid carriers include mineral powders, vegetable powders, alumina, silicates, sugar polymers, waxes, and the like.

In addition, liquid carriers include water, alcohols, aromatic hydrocarbons, halogenated hydrocarbons, ethers, ketones, esters, nitriles, alcohol ethers,
Examples include aliphatic or cycloaliphatic hydrocarbons, industrial gasoline and petroleum fractions.

Furthermore, when formulating emulsions, wettable powders, flowable preparations, etc., surfactants or emulsifiers are used for purposes such as emulsification, dispersion, solubilization, wetting, foaming, lubrication, and spreading.

Further, if necessary, a suitable amount of stabilizers such as antioxidants and ultraviolet absorbers can be added.

Furthermore, the composition of the present invention can be mixed with other acaricides, insecticides, attractants, repellents, fungicides, plant growth regulators, fertilizers, etc. , how to use it, when to use it, etc.).

The method of using the composition of the present invention is as follows.

That is, the application rate varies depending on the size of the crop, but generally the total amount of fenpropathrin or fluparinate and nithione in the active ingredient form is 0.3 to 550 per 10 are.
g, preferably 2 to 150 g. To spray this, dilute it with water for wettable powders or emulsions, and spray it on crops during the mite outbreak season, usually at a rate of 30 to 2,000 per 10 ares.
1, preferably at an application rate of 50 to 5001.

The composition of the present invention can be applied to citrus fruits such as citrus spider mites, citrus rust mites, and deciduous fruit trees such as apple spider mites and two-spotted spider mites.
It exhibits a synergistic control effect against mites such as the Japanese red spider mite, Kanzawa spider mite, false red spider mite, Kanzawa spider mite for tea, and the white spider mite, Kanzawa spider mite, false red spider mite, false red spider mite, and tea dust mite for tea, vegetables, and flowering plants compared to the individual application of each active ingredient. , these mites can be controlled extremely effectively.

Table 1 shows the chemical structural formulas of fenpropathrin, fluparinate and nithione, which are the active ingredients of the composition of the present invention.

Table 1 Among these, fenpropathrin and fluparinate have stereoisomers, and the present invention also includes isomers effective in acaricidal activity and mixtures thereof.

<Examples> Some examples are listed below, but the blending ratio of active ingredients,
The auxiliary components and the amounts added thereof are not limited to the following examples. In addition, all parts in the examples represent parts by weight.

Example 1 10 parts of fenbropathrin or fluparinate, 30 parts of nithion, 5 parts of sodium lauryl sulfate, 2 parts of naphthalene sulfonic acid sodium formalin condensate, 20 parts of white carbon, and 33 parts of clay were uniformly mixed and ground to form a wettable powder. get.

Example 2 10 parts of fenprobatrin or fluparinate, 10 parts of Nithion, 15 parts of Tsurpol 2564 (manufactured by Toho Chemical, nonionic and anionic mixed emulsifier), 65 parts of Kijirol
An emulsion is obtained by mixing and dissolving the two parts.

Example 3 5 parts of fenbrobatrin or fluparinate, 35 parts of Nithion, 15 parts of Tsurpol 2564 (manufactured by Toho Chemical, nonionic and anionic mixed emulsifier), 45 parts of Kijirol
An emulsion is obtained by mixing and dissolving the two parts.

Example 4 5 parts of fenpropathrin or fluparinate, 30 parts of nithion, 5 parts of sodium lauryl sulfate, 2 parts of naphthalene sulfonic acid sodium formalin condensate, 20 parts of white carbon, and 38 parts of clay were uniformly mixed and ground to make a wettable powder. get.

Next, the effects and usefulness of the composition of the present invention will be explained by giving test examples.

Test Example 1 The acaricidal activity against adult female citrus spider mites and eggs, which are resistant to organic phosphorus agents, organic tin agents, and hechinthiazox, and which are resistant to organic phosphorus agents, organic tin agents, and hechinthiazox, was investigated in a laboratory test using summer tangerine seedlings planted in a glass greenhouse. That is, female adult citrus spider mites were inoculated onto tangerine leaves fixed on agar gel, and after spawning for one day, Example 2 and Example 3 were sprayed using a quantitative spraying device.
A predetermined concentration water dilution solution of the emulsion of the present invention prepared according to
It was sprayed in an amount equivalent to 30j7 per area, and the adulticidal effect was examined after 2 days and the ovicidal effect after 10 days. This test was conducted in two groups with 10 adult insects per chemical solution treatment. The results are shown in Table 2. In the following test examples, the ovicidal effect refers to the combination of ovicidal and hatchicidal larvae. The acaricidal activity against adult female Kanzawa spider mites and their eggs was investigated in a laboratory test. Specifically, female Kanzawa spider mites were inoculated onto kidney bean leaves fixed on agar gel, and after allowing them to lay eggs for one day,
Using a quantitative spraying device, a predetermined concentration water diluted solution of single or mixed synthetic pyrethroids and organic phosphorus agents containing the combination of the present invention is sprayed in an amount equivalent to 3 (liter) per 10 are, and after 2 days, the adulticidal effect is 9. The ovicidal effect was examined after 1 day.
The chemical treatment was carried out in two groups with 10 adult insects. The results are shown in Table 3.

Test Example 3 Twenty female adult two-spotted spider mites, which are resistant to organic phosphorus agents and organic tin agents, which are resistant to organic phosphorus agents and organic tin agents during continuous rearing, were inoculated into 5- to 6-leaf stage green beans planted in a glass greenhouse, and settled and laid eggs.

Seven days after establishment and spawning, a predetermined concentration diluted water solution of the hydrating agent of the present invention prepared according to Example 1 was sprayed using a hand sprayer in an amount equivalent to 100j7 per 10 are.

Immediately before spraying, 3 days, 10 days, 20 days, and 30 days after spraying, the number of parasitic female adult spider mites and chemical damage were determined, and the control value (%) was calculated.

This test was conducted in three plots, with one plant per chemical solution treatment. The results are shown in Table 4. In addition, the control value (%) in the test example is calculated using the following formula: Ca: Number of insects in non-sprayed area before spraying Cb = Number of insects in non-sprayed area after spraying Ta: Number of insects in sprayed area before spraying Tb: Number of insects in sprayed area after spraying Test Example 4 A predetermined concentration water dilution of the emulsion of the present invention prepared according to Example 3 was applied using a hand-held sprayer using a No. 10 unglazed potted Okitsu-Wase Satsuma mandarin orange in which mandarin orange spider mites are frequently found. It was distributed in small amounts. Immediately before spraying, 3 days after spraying, 10 days after, 20 days after, and 30 days after spraying, the number of parasitic female adult spider mites and chemical damage on arbitrary 20 leaves per tree were examined, and the control value (%) was calculated.

This test was conducted in three plots with one tree per chemical treatment. The results are shown in Table 5.

Test Example 5 Adult female two-spotted spider mites, which had been reared for generations and were resistant to organic phosphorus agents, were parasitized on green beans planted in pots (diameter 9an) in an artificial climate room. A predetermined concentration water dilution solution of the hydrating agent of the present invention prepared according to Example 4 was sprayed on the green beans at 30 kg per 3 pots. The pots were stored indoors at 25°C ± 1°C. The number of female adult Nami/'t mites was investigated on designated mortars before and after spraying. The results are shown in Table 6 and 7. <Effects of the invention>

Claims (2)

[Claims] (1) (a) α-cyano-3-phenoxybenzyl 2,
2,3,3-tetramethylcyclopropanecarboxylate or α-cyano-3-phenoxybenzyl N-(
2-chloro-α,α,α-trifluoro-p-tolyl)
A miticide composition comprising valinate and (b) O,O,O,O-tetraethyl S,S-methylenebisphosphorodithioate as active ingredients. (2) α-cyano-3-phenoxybenzyl 2,2,3
, 3-tetramethylcyclopropanecarboxylate and O,O,O,O-tetraethyl S,S-methylenebisphosphorodithioate as active ingredients.